WASHINGTON (Reuters) – U.S. job growth almost stalled in February, with the economy creating only 20,000 jobs amid a contraction in payrolls in construction and several other sectors, which could raise concerns about a sharp slowdown in economic activity.

The moderation in employment growth reported by the Labor Department on Friday is in line with a slowing economy that in July will mark 10 years of expansion, the longest on record. It supports the Federal Reserve’s “patient” approach toward further interest rate increases this year.

While February’s job growth was the weakest since September 2017, other details of the closely followed employment report were strong. The unemployment rate fell back to below 4 percent and annual wage growth was the best since 2009.

In addition, data for December and January was revised to show 12,000 more jobs created than previously reported.

Economists polled by Reuters had forecast nonfarm payrolls rising by 180,000 jobs last month and the unemployment rate falling to 3.9 percent. The slowdown likely reflected the fading weather-related boost in the prior two months and workers becoming more scarce.

A stock market selloff and jump in U.S. Treasury yields in late 2018 were also likely factors..

The slowdown in hiring was flagged by first-time applications for jobless benefits, which were elevated in February. Also, Institute for Supply Management surveys showed measures of manufacturing and services sectors employment dropped in the month, while the Fed on Wednesday reported “modest-to-moderate gains” in employment in a majority of the U.S. central bank’s districts.

Though the economy grew 2.9 percent in 2018, the strongest in three years, it lost momentum as the year ended. Retail sales, homebuilding, business spending and exports all declined in December, setting the economy on a slower growth path.

Despite the weakness in hiring last month, the unemployment rate fell two-tenths of a percentage point to 3.8 percent in February as federal government workers who were temporarily unemployed during a 35-day partial shutdown returned to work. The longest shutdown in U.S. history ended on Jan. 25.

A broader measure of unemployment, which includes people who want to work but have given up searching and those working part-time because they cannot find full-time employment, dropped to 7.3 percent after hitting an 11-month high of 8.1 percent in January because of the government shutdown.

Average hourly earnings rose 11 cents, or 0.4 percent in February, partly because of a calendar quirk, after gaining 0.1 percent in January. That raised the annual increase in wages to 3.4 percent, the biggest gain since April 2009, from 3.1 percent in January. Overall, wage inflation remains moderate.

A report on Thursday showed labor costs rising only 1.4 percent in 2018, the smallest gain since 2016, after increasing 2.2 percent in 2017.

Economists say employers have kept hiring at a strong pace despite low unemployment as more people returned to the labor force, including students, women and people who had dropped out to collect disability benefits.

Employment at construction sites fell by 31,000 jobs, the biggest drop since December 2013, after increasing by 53,000 in January. The leisure and hospitality sector added no jobs last month.